Getting a Logitech G510's Windows key to work as the command key on OSX

So the G510 has a joystick stick on the upper row of the keyboard next to mute and MR button. If this is on the Logitech Gaming software doesn't detect the Command key when you try to detect the button.

Click the plus sign next to the word 'Command', detect it and add it to your keystrokes list. Its also worth saving it to a separate profile if you switch between PC's a fair bit.